Tweak language stats bar (#10487)

- Ensure bar does not overflow parent
- Remove unneccessary borders/background
- Fix shaky animation caused by JS animation miscalculation by setting
  fixed height on the summary box. Box itself is still shaky during
  animation, but better it then the whole page.

Fixes: https://github.com/go-gitea/gitea/issues/10474

templates/repo/sub_menu.tmpl

@@ -1,4 +1,4 @@
-<div class="ui segments">
+<div class="ui segments repository-summary">
 	<div class="ui segment sub-menu repository-menu">
 		<div class="ui two horizontal center link list">
 			{{if and (.Permission.CanRead $.UnitTypeCode) (not .IsEmptyRepo)}}

web_src/less/_repository.less

@@ -2011,19 +2011,31 @@
         }
     }
 
+    .repository-summary {
+        height: 48px;
+        overflow: hidden;
+
+        .segment.language-stats-details,
+        .segment.repository-summary {
+            border-top: none;
+            background: none;
+        }
+
         .segment.language-stats {
             padding: 0;
-        height: .6em;
+            height: 11px;
             display: flex;
             white-space: nowrap;
             width: 100%;
+            border-radius: 0;
 
             .bar {
                 white-space: nowrap;
                 border: 0;
                 padding: 0;
                 margin: 0;
-            height: .6em;
+                height: 100%;
+            }
         }
     }
 }